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Phytoene synthase : ウィキペディア英語版 | Phytoene synthase
Phytoene synthase (, ''prephytoene-diphosphate synthase'', ''15-cis-phytoene synthase'', ''PSase'', ''geranylgeranyl-diphosphate geranylgeranyltransferase'') is a transferase enzyme involved in the biosynthesis of carotenoids. It catalyzes the conversion of geranylgeranyl pyrophosphate to phytoene.〔(Phytoene synthase )〕 This enzyme catalyses the following chemical reaction : 2 geranylgeranyl diphosphate 15-cis-phytoene + 2 diphosphate (overall reaction) :(1a) 2 geranylgeranyl diphosphate diphosphate + prephytoene diphosphate :(1b) prephytoene diphosphate 15-cis-phytoene + diphosphate This enzyme requires Mn2+ for activity. It belongs to squalene/phytoene synthase family of proteins. == References ==
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